I Have A Quiz Tomorrow So I Need To Understand Them Clearly Before I Entered The

hi, I need some help with those questions asap, please. 

I want to get the solutions of those equations, please. I have a quiz tomorrow, so i need to understand them clearly before I entered the quiz .

https://drive.google.com/file/d/1TxtMzpG27jKCKEdYDF9p-uAqMPhO239Z/view